Outer Limits 4x4 Board

rumpig89 wrote:pics of where people have put them in gq? contemplating gettin one

NOTE: Ignore the boost gauge reading - its fixed now.

I have two of these gauges one pyro and one boost. Anyway I had the car tuned a few weeks back and the mechanic checked my pyro with his hand held infra-red thermometer and commented it was miles out (like 100 degrees C cooler) anyone checked the accuracy of theirs? Wonder if its just difference in gas temp compared to dump pipe wall temp, but would have thought it would read higher not lower as it does. Might take the probe out have a look and give it a clean.

My guess would be that the internal probe temp and where your mechanic measured from would have at least 100 degrees difference. There is no way you can accurately measure the internal gas temps from an external surface using the "point and shoot" method.

Just my 2c.

whos your mechanic?
dont wanna say too much for fear of putting my foot in my mouth, but that seems like a very fail way of measuring EGT temp.
there are lots of hot things in that area, if it picked up on the manifold or anything like that, its gonna read hotter.
find a mechanic with a known accurate one, and swap them over and see how close they read

I have exactly what coxy has (and where EXACTLY did you get the idea to mount yours there LOL ) my diesel mech (diesel-tec) drilled another hole about 10mm closer to the turbo and put his machines probe in there, and his only comment was that my gauge was slower to respond than his, but his also seemed much smaller/thinner, which would account for this. No comment at all about it being inaccurate.

Also how does an infra-red hand held thermometer measure your exhaust GAS temp? It will only measure surface temperatures (i.e. not the EGT).

I have the same gauge- when the engines cold and before its started, it reads the same temp as ambient. OK, this doesnt prove its accurate at 400 degrees plus, but its a good sign.....

I have the red one and i find i can push the temp up to 620 was thinking pump timming was out but might try a different gauge and check that first.

If you want to check the accuracy to a point try testing it in water by bringing it up to the boil while it's in there. If you have an old fashioned thermometer to gauge it by as well all the better. Not a technical method of calibration but should give you a good idea. Otherwise only real way is to get it tested against a calibrated gauge of some sort.

Rangie Thing wrote:I have the red one and i find i can push the temp up to 620 was thinking pump timming was out but might try a different gauge and check that first.

If thats post turbo and the gauge is accurate that's scary and not sustainable.
Pre turbo, not a problem.